You see me trying to set the viewport variables $vpr, $vpt and $vpd, which did not function. The primefield was computed for numbers 1 to 1,000,000 by a Python script, the first 36 lines were copy-pasted into the node string node.

In fact i checked openscad behaviour for $vpt etc... These vars are used as global and seem having no effect when used in module parameter.I will a a global node 'openscadsettings ' for all these vars, so that you'll be able to set then before declaration of module